Sand drier



IM WQ v 1 2 SheetS-Sheet 1 w mm 1 a m N IN 5 Q 1 Filed Jan. 10 1925 July 21, 1925.

WITNESS lrivzuron C. 5-. Franc/v.

A TTORNEYS 2 Shuts-Shoot 2 C. S. FRENCH SAND DRIER Filed Jan. 10, 1923 July 21, 1925.

To all eoh om it may I concern Patented July 21, 1925.

f NITED STATES CHARLES sbranivcii, OF'EOKMAN', wEsr-viReINIA.

D 5mm Application filed January 10,1923. SeriaI No. 611,894.

Be it known that I, CHARLEs S. FRENCH, a citizen of the United States, and a resident of Eckman, in] the county of McDowell, State o-fWest Virginia, have invented certain new and useful Improvements in Sand Driers, of which thefollowing is a specification. 7 s i This invention relates to sand driers, and

has for itsobject theprovision ofa device having apositive circulationof hot airinclose association withdownwardly flowing sand passlng through the drier;

Anotherobject'of the 1nvent1on is the proe Tturn of a pyramidtand inverted with its top into which the vision of a device in which cool air is drawn in between a corrugated fire-box lining and the outer casing of the fire-box, cooling the lining, mixing with the products of combus tion from the fire-box and then the mixture is conducted'in close association with the sand. V v o 'A further object offithe invention is the provision of a device having an open flue above the fire-box in which a mixture of heated air and the products of combustion from said fire-box are caused to travel in close asociation with the descending sand in the drier, the said mixture being conducted from the center of the drier through a path spaced midway between the center and the periphery of the outer casing of the drier and thenback to, the center where it is exhausted. 1 A still further object of the invention is the provision of a device in which the ,direc-f tion of flow of the heated mixture of air and products ofcombustion which are conducted from the center of the, drier upon opposite sides of the centerv and then backto the in the claims.

center again, maybe reversed.

With these and other ob ects in view, the

invention consists of certain novel features of construction, as hereinafter shown and described and then specifically pointed out In the drawings {Figure tie a VlGW lIl perspective of the drier in position for operation,

V Figure 2 is a plan view of, the same,

Figure 8 is a view'in perspective of an open flue inverted for distributing hot air to thesand, e Y Figures; is a vertical 'sectionof the drier, Figure 5 is a horizontal f section taken i along the, line 5-5 of Figure 1, and 1 7 view in perspectiveflof the [Figure 6 is a corrugated fire-box lining I Referring, to the drawings, 1 designates a brick'base upon which the drier is supported. Uponthebase is located a grate section 2 which is in the shape of 'a frustum of a pyramid and having the laterally extending flanges 3 cast integrally with the section 2. A peripheral fiange'at is formed integrally wlth the flange '3 in, upstanding relation 'with said flange and adapted to form a means forjholding the lower reduced end of theoute'r casingi5 of the. drier. A

The outer casing is in'the shape of a nus the grate section in order to cause the grate spaced sufliciently below the upper end of 7 to extend partially, into the fire-box outer 1 casing 8. The casing 8 is likewise in the shape ofa frustum of'a pyramid having its lower reduced end in engagement with the corners of the grate 7 The grate is provided with extensions 9 adj acentits corners adapted to rest upon the cleats 6 and thereby space the periphery of the grate from the lower end of the fire-boxcasing 8 and the upper end of thegrate section 2 inorder'to permit air which passes through the opening'10 in the gratesection to enter between the corrugations '11 of the fire-box lining 12 and. pass upwardly into the .member 13 which has its lower end seated upon the upper end of the fire-box casing8.

The corrugated inner lining 12 provides passages between the lining and the outer casing 8 of the fire-box in orderto permit air passing upwardly between the lining and the'outer casing to coolthe lining and prevent warping of the same. The lining 12 is provided with an opening- 14 which leads to the interior of the fire-box while the outer'casing 8 of the fire box is provided with a similaropening ha'v-* QtiQIi of the flange 3. The peripheral edge of the flange is in engagement with the inner wall of the front of the casing 5 of the sand drier. The outer casing 5 is likewise provided with an opening which is in alinement with the openingsin the lining 12, and in the outer casing 8 of the fire-box. The material of the jacket or outer casing 5 at said opening is provided with inturned flanges bolted to the outer faces of the flange 15. A door is provided for said opening and is hingedly mounted on one vertical edge of said flange.

It will be noted that the casing 5 is equally sp-aced by reason of its frusto-gyramidal shape from the outer walls of the fire-box casing 8, and in practice I propose to space them at least two inches apart.

The member 18 is provided with an opening 19 at its upper reduced end in order to receive a section 20 of a flue. The section of the fine is substantially squareshaped and provided in its front and rear faces with triangular openings 21 and 21 These openings are connected to .inverted llshaped conduits 22 and 23 shown more particularly in Figure 3. An inverted if-shaped conduit at having open ends is provided in one face with notches 25, 26 and 27 to the peripheries of which are connected the inverted V-shaped conduits respectively 28, 22 and 29. -he conduits 28 and 29 are spaced on opposite sides of the fluesection 20. Parallel with the conduit 24: is a second conduit 30 which is likewise provided with three V-shaped openings 31, 32 and 33 respectively connected with the opposite ends of the conduits 28, 23 and 29.

The opposite ends of the conduits 2 1 and are provided with flanges for connecting these ends to the opposite faces of the outer casing 5 of the drier.

A damper 3 1- is mounted centrally of the flue section 20 on a shaft 35 which has a vertical extension 36 extending to a point above the horizontal dues and pivotally connected to an operating handle 37. This handle ex tends throng 1 a perforation in the front wall of the outer casing 5. The weight of the extension. 36 is sulhcient to maintain the damper in any one of its predetermined positions. A pipe 38 is mounted on the flue section and extends above the upper end of the casing 5 for exhausting products of combustion from the fire-box and the heated air which passes up between the fire-box 9 and the outer casing 8 of the fire-box.

The outer casing 5 of the drier may be cast integrally or formed in four pieces with two of its sides provided with flanges which are riveted to the two other sides, shown more particularly in Figure 1. e

The operation of my device is as follows:

Sand is poured into the opening in the top of the casing 5 over the inverted V-shaped fines 22, 23, 24c, 28, 29 and 30. The sand travels downwardly along the sides of the outer casing 5 along the sloping sides of the sections 13 and along the outer walls of the outer casing 8 of the fire-box until it reaches the laterally extending flange 3. The sand forms a l -shaped bottom beneath the tines, 22, 28, 24, 28, 29 and 30' thereby forming a passage for free circulation of air and gases. The damper is placed in a vertical position before the fire is startedin order to pr vide a direct passage of the gases to the atmosphere. When the fire is well under way the damper is positioned as shown in Fig, 3.

Fire is started in the fire-box with the materials for maintaining the fire being passed through the alined openings in the lire-box lining 12, the outer casing of the fire-box and the casing 5 of the drier. The dry sand "falls through the perforations 17 and 17 which are formed in the flange 3 an d then downwardly along the sloping wall of the grate section 2.

The heated air passing upwardly between the corrugated lining 12 and the outer casing 8 of the fire-box mixes with the prod.- uct of combustion from the firefbox in the section 13 then. passes upwardly into the flue section 20. The damper 3 1' being in the position shown in Figure 3 directs the mixture through the opening 21- into the con' duit 30. From this conduitthe gasespass in opposite directions to the conduits 28 and 29, then into the conduit24 through the conduit 22 and then back through the opening 21 into the flue section 20 when it is exhausted through the pipe 38 into the atmosphere.

It will be noted that the heated air passing through the conduits 22, 24c, 28, 29, 30 and 23 will be in close contact with the sand passing through the drier and remove the moisture from the sand which is carried outwardly with the heated mixture from the fire-box.

lVhe-n it is desired to reverse the flow of the heated mixture from that just described the crank arm 27 may be reversed in its position thereby reversing the damper 34 causing the heated mixture to pass through the opening 21 to the conduits 24, 28, 29, 30 and 23, thence through the opening 21. into. the flue section 20 then through the pipe 38 to the atmosphere. The reversal of the position of the damper 34 provides means for reversii'ig' the direction of flow of the heated gases through the inverted V-shaped flues whereby soot and other matter that has collected in the fines adjacent the exhaust ports 21 and 21 will be burned by the heated gases from the fire-box. The oscillation of the dan'lper in the flue section 20 scrapes off any soot which has collected therein and thereby provides a means for preventing clogging of said section.

The heated air which is carried up sep mentioned means.

arately' between the fire-box lining '12 and theouter casing 8 has a double function in that itnot only coolsthe fire-box lining 12 andfprev e'nts warping of the same, 'butadmits a quantity of air to the fines which'fis not required to be conducted throughthe firebox on its way to saidfiues, thereby pro? viding for a saving of fuel. The air is heated as it passes throughthe corrugations and further aids in removing any moisture still in the' sand' when passing'between the outer casing 8 of the fire-b0x and that portion of the casing 5 which is equally spaced 1 at all points from the casing 8.

i What "I claim is:

sanddrier comprising i ormer cas-v 1 mg form ng a sand hopper, a fire-box within the casing, means for conducting the heated products of combustion from the'firebox to a point adjacent the top oitthectmsing,

means for conducting said heated gases in a path from'the center of the casing around in; a path'from'the "center of the casing aroundjthe interior of the casing and spaced itrom'thecenter, then back to the center and in close association with the moving sand, and means for reversing the direction of flow o'f the heated gasesthrough the last- 3 sand drier' comprising an outer cas ing forming a sand hopper, a'fire-box with-' in the, casing, means for conducting the heated'products of combustion from the fire box to a point adjacent the top or the casing, means for conducting said'heated gases in a path from the center of the casing around the interior of the casing and spaced from the center, then back to the center and in close association with the moving sand, and means forseparatelyconducting heated air to the last-mentioned means.

4. A said drier comprising an outer casing forming a sand hopper, a fire-box'within the casing, means for conducting thev heated products of combustion from the'firebox to a point adjacent the top of the casmg, means for conducting said heated gases in a'path from the center of the casing,

around the interior of the casing and spaced from the center, then back to the center and in close association. Withthe -mov1ng sand.-

: "5. A sand drier comprising an outer casing forming a sand hopper, a fire box within the casing, means for conducting the heated products of combustion from the fire box to a point adjacent the top of the casing, means, for conduc'tin said heated gases in a path away from the center of the casing V and around the interior of the'casing, said path being spaced from the centerand back to the center and in close association with the moving sand, said means for conducting the heated j products of combustion 1 from i the fire box 'being spacedffrom the sidewalls ofthe fire box and in open'communication with theatmosphere-below the fire-box for directing" fresh- 'airaround the fire box through the heated products of combustion above said firebox. 1 5

6. A sand drier comprising an outer casing forming a sand hopper, a fire-box within said casing, a-flue for conducting, the

productsof combustion from thefire-box to apoint adjacent the topoi the casing, con'- V duits havingopen bottoms arrangedin open communication with eachother' and spaced from the sides and center of the outer casing,'a'centrally dis-posedvfiue connected with the fire-box and'c'onduits connecting certain of the first-mentioned conduits with .said fiue w'hereby the hot gases of combustion fromthe firebox are circulated close association with hopper.

7. A sand ingforming a sand hopper, a fire-,box'withproducts of combustion from the fire-box to apoint adjacent the top of the casing,

conduits having open bottoms arranged in open-communication with each otherfand spaced from thesides and center of the outer casing, acentrally CllSPOSGClfiLlG con- 'nected with the fire-box and conduits con- 'necting certain of the first-mentioned conduits with jsaid flue whereby the hot gases ofcombustion from the fire-box are circu lated in close associat on with the moving sand in the hopper, and means in the flue for causing the hot gases to flow fromone side of the flue to the conduit to the opposite side of the flue.

8. A sand drier comprising an outer casing forming a sand hopper, a fire-box within said casing, a fine for conducting theproducts of combustion from the fire-box to a point adjacent the top of the casing, conduits having open bottoms arranged in open communication With each other .and spaced from the sides and center of the -'outer casing, a centrally disposed flue connected with the fire-box and conduits connecting certain of the first-mentioned'conduits with saidfiue, whereby the hot gases of combustion from the fire-box are circulated in close association withthe moving .sand in the hopper, and means in the flue for causing the hot gases to flow from one side of the flue tothe conduit to the opposite side of the flue, said last-mentioned means being movable to change the directhe moving sand in thedrier comprising an outer cas- I p lm said casing, 'a' flue) fer-conducting the v tion of flow of the gases through the con duits.

9. A. sand drier comprising an outer casing forming a sand hopper, a fire-box within said casing, conduits having open bot toms arranged in open communication with each other and spaced from the sides and center of the outer casing, a centrally disposed flue connected with the fire-box and conduits connecting certain of the firstmentioned conduits with said flue whereby the hot gases of combustion from the firebox are circulated in close association with the moving sand in the hopper, means in the flue for causing the hot gases to flow from one side of the flue through the conduits to the opposite side of the flue, and means for diverting a portion of the air conducted towards the fire-box around the lire-box and to the. centrally disposed flue.

10. In a sand drier, a grate supporting section having a lateral flange projecting outwardly from its upper periphery and providedv with a plurality of spaced perforations, a grate mounted in the upper end of the grate supporting section with a portion of the grate projecting above the lateral flange, a firebox comprising an outer casing having its upper and lower end open with the periphery of the lower end in en- I gagement with the periphery of the grate,

ing forming a sand hopper, a fire-box within the casing, a flue centrally disposed on the casing and connected with the fire box, a plurality of lines in open communication with the centrally disposed flue and having a bottom portion open whereby the hot gases from the fire-box are conductedin close association with the sand, and means for causing the hot gases from the centrally disposed flue to be conducted from one side of the flue to the conduits in opposite directions back to the centrally disposed flue where said gases are exhausted.

12. A sand driercomprising an outer casing "forming a sand hopper, a lire-box within the casing, a flue centrally disposed on the casing and connected with the fire-box, a plurality of fiues in open communicatio with the centrally disposed flue and having bottom portions open whereby the hot gases from the fire-box are conducted in close association with the sand, and means for causing the hot gases from the centrally disposed fiue to be directed from one side of the flue to the conduits in opposite directions back to the centrally disposed flue whereby said gases are exhausted, said last means including movable means for scraping soot collected in the centrally disposed flue.

13, A sand drier comprising an outer casing forming a sand hopper, a lire-box withing the casing, a flue section connected with the fire-box, horizontal fiues in open communication with the flue section, a damper in the flue section pivotally mounted centrally of said section, means for oscillating the damper whereby soot collected in the flue section is scraped from the wall of said section by the side edges of the damper.

CHARLES S. FRENCH. 

